Question

Which of the following processes does not require energy?

• A. Osmosis
• B. Diffusion
• C. Passive transport
• D. All of the above

Answer 1

The correct option is D All of the above

Three transport processes that do not require energy are; diffusion, osmosis and facilitated diffusion. Facilitated diffusion is a passive process: the solutes move down their concentration gradient and do not require the expenditure of cellular energy for this process. Carrier proteins and channel proteins allow for the diffusion of molecules across the cell membrane.